code: def test_logout_button_warns_when_not_on_spaces(self):
      with pytest.warns(UserWarning):
          with gr.Blocks():
              gr.LogoutButton()
  
file_path: gradio/test/test_buttons.py
imports: from unittest.mock import patch
  import pytest
  import gradio
label_desc: Use image node_id 2 for calling the TestOAuthButtons obj's underlying member method code with example usage: obj.test_logout_button_warns_when_not_on_spaces() without return types